72143896 has 32 divisors (see below), whose sum is σ = 149046480. Its totient is φ = 32464000.

The previous prime is 72143891. The next prime is 72143899. The reversal of 72143896 is 69834127.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72143891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4830 + ... + 12946.

Almost surely, 2^72143896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72143896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74523240).

72143896 is an abundant number, since it is smaller than the sum of its proper divisors (76902584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72143896 is a wasteful number, since it uses less digits than its factorization.

72143896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8235 (or 8231 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 72143896 is about 8493.7562950676. The cubic root of 72143896 is about 416.2937243911.

The spelling of 72143896 in words is "seventy-two million, one hundred forty-three thousand, eight hundred ninety-six".